bretcarmichael , 
#Cloudflare is rewriting links on sites that reference the malware-serving Polyfill[dot]io domain. It’s understandable that a site owner wouldn’t want their infrastructure provider to modify code on their site. In this case, Cloudflare is modifying the code to serve scripts as originally intended by the site author. I’m in favor of this,
https://blog.cloudflare.com/automatically-replacing-polyfill-io-links-with-cloudflares-mirror-for-a-safer-internet
